Roller shoe mechanism



Jan. 14, 1941. F. A. JUCKETT ETAL.

ROLLER SHOE MECHANISM Filed Jan. 23, 1940 ATTORNEY.

Patented Jan. 14, 1941 UNITED s'ra'rss PATENT. i t'lCE ROLLER SHOE MECHANISM Application January 23, 1940, Serial No. 315,268

8 Claims.

This invention relates to improvements in pa per pulp screens and is directed more particularly to improvements in operating means therefor.

Apparatus of the type to which the invention relates is shown and described in United States Letters Patent No. 1,578,590 of March 30, 1926.

The principal objects of the invention are di rected to the provision of an operating device for a paper pulp screen apparatus which by reason of the novel construction and arrangement is simple in form and rugged in construction, so as to be economical to manufacture and efiicient in its operation, while at the same time it is arranged to facilitate the ready and easy assembling and disassembling of the same when desired.

Various novel objects and advantages of the novel apparatus of the invention will be hereinafter more fully referred to in connection with the accompanying description of the preferred form thereof, reference being had to the accompanying drawing, wherein:

Fig. 1 is an end elevational view of the operating mechanism of the invention with parts in section for clearn-ess;

Fig. 2 is a side elevational view of the operating mechanism shown in Fig. 1;

Fig. 3 is a sectional plan view on the line 3-3 of Fig. 1;

Fig. 4 is a sectional plan view on the line 4-4 of Fig. 2;

Fig. 5 is a fragmentary sectional elevational view at the lower end of one of the columns of the operating mechanism; and

Fig. 6 is a side elevational view of the lower end of the columns shown in Fig. 5.

Referring now to the drawing more in detail, the invention will be fully described.

In connection with the drawing, there is shown a single operating apparatus for a pulp screen, it being understood that depending upon the length of the screen construction one or more of the devices may be employed and, of course, one may be the duplicate of another.

A base or cam pocket is represented by 23 which is hollowed out, to provide a chamber, as shown, and which is adapted to be secured to a suitable support associated with the pulp screen. A channel 4 in the lower portion of the base is in communication with the pocket or chamber 6 of the base and a plug 8 or the like is provided therein to facilitate the drawing oil? of lubricant.

A pair of half-housings H) are secured to the upper side of the base as by bolts l2. These housing parts ii! and sockets 22 in the upper portions of the housing receive rollers 44, the parts being arranged so that the rollers more or less guide the columns 58 to facilitate their free up and down movement.

A shaft, which represents the shaft of the pulp screen apparatus, is represented by 26, and on it at spaced intervals and depending upon the spacing of the operating devices, there are cams, such as 28, one for each operating mechanism.

A roller shoe 3K3 has shaft 32 journalled in the lower end of the columns it after the manner later to be described which roller shoe rides on the cam 28. As the shaft 26 rotates so that the cam is rotated thereby, the diaphragm memher is moved upwardly.

The diaphragm member it) has a lower horizontally disposed wall 3d at the upper end of the vertical columns l8, and spaced side walls 36 extending upwardly therefrom which are joined to an upper horizontally disposed plate w it. The plate is provided for securing to the diaphragm of the pulp screen apparatus.

A bolt 50 having a head part 52 disposed below central parts 54 of the housing members extends upwardly from the housing and is loosely received in the horizontal wall 34 of the diaphragm member 29. An arm 58 on the upper end of the bolt 5|] has side pads so. Compression spings 62 are disposed between the lower sides of the parts Bi! and the horizontal part 34 of 40 the diaphragm member and said springs tend to urge the diaphragm member downwardly to hold the roller shoe 30 on the cam 28. As the cam through the roller shoe moves the diaphragm upwardly the movement is against the action of the springs.

Opposite sides of the member 58 are provided with grooves 54 in which tongues 66 in opposite sides of the walls 36 are received. The grooves and tongues function to guide the diaphragm member and arm member in their relative up and down movements. The columns iii are hollowed out at l9 as shown in Fig. 4 for receiving luricant and inlet openings at the upper ends thereof and leading into the hollowed-out portions are provided with closures 68 pivoted at H! for swinging movements.

The lower ends of the column have secured thereto axle blocks 74 as by bolts 16 in which the axle 52 of the roller shoe is rotatable. Passageways 16 in the blocks are in communication with channels 18 in the lower ends of the columns l8 for purposes of lubrication. A transversely extending part at the lower ends of the columns are bored at 82 and connecting passageways 84 in the member 80 and blocks 14 are provided for lubricant to the shaft 32 and a plug 86 is provided in an end of the bore 82.

While I have described the invention in great detail and with respect to the present preferred form thereof, it is not desired to be limited thereto since changes and modifications may be made therein without departing from the spirit and scope of the invention. The invention may be embodied in other specific forms without departing from the essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

1. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having depending columns reciprocable up and down in said housing, a rod extending upwardly from said housing relative to which said diaphragm is reciprocable and spring means between the upper end of said rod and said diaphragm member urging the said member downwardly, a roller for riding on a cam in said housing, and journal means for said roller at the lower ends of said columns.

2. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending columns reciprocable in said housing, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, and journal means for said roller associated with the lower ends of said columns, said yielding means including a rod extending upwardly from the housing having an arm on the upper end thereof provided with side portions and springs between said portions and said housing.

3. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending columns reciprocable in said housing, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, journal means for said roller associated with the lower ends of said columns, said yielding means including a rod extending upwardly from the housing having an arm on the upper end thereof provided with side portions and springs between said portions .and said housing, and guide means associated with said arm and diaphragm member for guiding the same for relative reciprocating movements.

4. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending columns reciprocable in said housing, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, and journal means for said roller associated with the lower ends of said columns, said journal means including an axle projecting from opposite sides of said roller rotatable in bores provided in blocks secured to the lower ends of said columns.

5. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending columns reciprocable in said housing, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, journal means for said roller associated with the lower ends of said columns, said journal means including an axle projecting from opposte sides of said roller rotatable in bores provided in blocks secured to the lower ends of said columns, and communicating lubricating channels in the lower ends of said columns and blocks for the axle bores therein.

6. The combination in mechanism for operating paper-making screens of, a housing including a pair of secured together members hollowed out to provide a. space for a cam and spaced vertically extending guideways, a diaphragm member having spaced depending columns reciprocable in said guideways, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam, journal means for said roller associated with the lower ends of said columns, said yielding means including a rod extending upwardly from the housing having an arm on the upper end thereof provided with side portions and springs between said portions and said housing, and guide means associated with said arm and diaphragm member for guiding the same for relative reciprocating movements.

7. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending columns reciprocable in said housing, yielding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, and journal means for said roller associated with the lower ends of said columns, said yielding means including a rod extending upwardly from the housing having a member on the upper end thereof and spring means between said member and said housing.

8. The combination in mechanism for operating paper-making screens of, a housing for a rotatable cam, a diaphragm member having spaced depending hollow columns reciprocable in said housing, yelding means associated with said housing and member urging the latter downwardly, a roller for riding on a cam in said housing, journal means for said roller associated with the lower ends of said columns, said journal means. including an axle projecting from opposite sides of said roller rotatable in bores provided in blocks secured to the lower ends of said columns, and communicating lubricating channels in the lower ends of said columns and blocks for the axle bores therein. 

